STIX-and-Asana.md

@@ -42,9 +42,9 @@ The basic issues to support new fonts are the following:
   This is the case for STIX 1.1 "General" (the legacy version)
   and Asana fonts, so we can in theory
    support local and Web versions. For other mathematical fonts like
-  STIX 1.1 "Word" (the new version with less files and OpenType Math table),
+  STIX 1.1 "Word" (the new version with less files and an OpenType Math table),
   Cambria Math, Neo Euler, LM-Math, Lucida fonts ; we could only support
-  modified versions with some glyphs moved to Unicode code points.
+  modified versions with some glyphs moved to actual Unicode code points.
 
 * In certain cases (old browsers, security restriction...), Web fonts are not
   available so MathJax has to use images fonts instead. For the
@@ -68,7 +68,7 @@ The STIX and Asana fonts are available in the following format:
 * STIX 1.1 "Word": one file for each style (Regular, Italic, Bold, BoldItalic)
   and one file with an OpenType Math Table (and so glyphs used for stretchy
   operators).
-* STIX 1.1 "General": the old sets with STIXGeneral, various files for
+* STIX 1.1 "General": the old set with STIXGeneral, various files for
   integral symbols, a STIXNonUnicode file for some non unicode glyphs and
   various files for size variants. Some of these files have variants for each
   style (Regular, Italic, Bold, BoldItalic).
@@ -103,19 +103,19 @@ take into account:
   the MathJax fonts since the local and Web versions are the same.
   We could also put some copies of the (non-modified) STIX and Asana fonts
   in a separate directory that will be used by the Native MathML output only.
-  Note that download time is not a problem for the Native MathML support and
-  we can probably just focus on the most recent woff format.
-  In the long term, they are likely to support the Open Type tables and we
-  could maybe copy this table into our Web fonts. That's another reason why
+  For Native MathML support, note that we
+  we can probably just focus on the most recent woff format and that
+  download time is not a problem.
+  In the long term, browsers are likely to support the Open Type tables and we
+  could maybe copy these tables into our Web fonts. That's another reason why
   it is best to work with STIX "Word".
 
 * STIX and Asana have much more characters than our MathJax TeX fonts. Of
   course that's one of the reason why we want to support them (besides
   providing alternative styles). So we need more categories than those
   given in MathJax. The most obvious option is classification by font style
-  (bold, italic, bold-italic) and to follow existing Unicode
-  subcategories (for example those given in
-  [chapter 7 of the MathML 3 recommendation](http://www.w3.org/Math/TR/chapter7.html#chars.entities)). Finally, we can provide a file with all the remaining
+  (bold, italic, bold-italic) and to follow existing MathJax/Unicode
+  subcategories. Finally, we can provide a file with all the remaining
   characters, that are less often used in mathematics.
   In the future, we could consider a "mixed mode" where MathJax TeX fonts
   are used by default with other STIX/Asana Web fonts covering the missing
@@ -140,27 +140,100 @@ The file hierarchy could look like this:
   * output/SVG/fonts/
       * Idem mutatis mutandis.
 
-The STIX and Asana fonts will be split into the following
-categories. Other subdivisions will be used for Regular, Bold, Italic
-Bold-italic. We will preserve the Unicode code points, except for 
-STIXMath-Regular where the glyphs must be moved to one of the PUA.
-
-* Main or Math?
-* Size1
-* Size2
-* Size3
-* Size4
-* Caligraphic (regular, bold, italic, bold-italic)
-* double-struck
-* script
-* fraktur
-* sans-serif
-* monospace
-* isoamsa Added Math Symbols: Arrow Relations
-* isoamsb Added Math Symbols: Binary Operators
-* isoamsc Added Math Symbols: Delimiters
-* isoamsn Added Math Symbols: Negated Relations
-* isoamso Added Math Symbols: Ordinary
-* isoamsr Added Math Symbols: Relations
-* ...
-* Other
+The STIX fonts will be split into the following files. In most cases,
+we will preserve the Unicode code points. We will follow the
+subdivision of MathJax fonts, but ignore the distinction between Main/Math
+and Caligraphic/Script. The remaining glyphs will be classified using
+their Unicode Blocks.
+
+* STIX\_Main-Regular, STIX\_Main-Italic, STIX\_Main-Bold, STIX\_Main-BoldItalic.
+
+  These fonts will contain the glyphs from Basic Latin Unicode block
+  (U+0000 to U+007F) as well as the characters from the MathJax-Main fonts.
+
+* Various fonts for the [Mathematical Alphanumeric Symbols](https://en.wikipedia.org/wiki/Mathematical\_Alphanumeric\_Symbols).
+
+  These fonts will cover all the glyphs from MathJax's
+  Caligraphic, Fraktur, Sans-serif, and Greek fonts.
+  We can probably do a remapping to ASCII positions (as we do for the
+  MathJax fonts) to avoid bugs with some browsers not able to access
+  non-BMP characters. Note that latin characters and digits for
+  normal, bold, italic and bold-italic mathvariants are already contained
+  in the STIX-Main-* fonts, so we only need to add new files for greek letters.
+  The other files will contain the latin/greek letters and digits for the
+  corresponding mathvariant category.
+
+  * STIX\_Greek-Regular, STIX\_Greek-Bold, STIX\_Greek-Italic,
+    STIX\_Greek-BoldItalic
+  * STIX\_Script-Regular, STIX-Script-Bold
+  * STIX\_Fraktur-Regular, STIX-Fraktur-Bold
+  * STIX\_DoubleStruck-Regular
+  * STIX\_SansSerif-Regular, STIX\_SansSerif-Bold, STIX\_SansSerif-Italic,
+    STIX\_SansSerif-BoldItalic
+  * STIX\_Monospace-Regular
+
+* STIX\_AMS-Regular, STIX\_AMS-Bold, STIX\_AMS-Italic, STIX\_AMS-BoldItalic
+
+  These fonts will cover all the characters from MathJax-AMS, that are needed
+  to support the AMS extension.
+
+* Fonts for strechy operators
+
+  STIXMath-Regular
+  glyphs must be moved to one of the PUA.
+
+  * Size1
+  * Size2
+  * Size3
+  * Size4
+
+* Other Unicode blocks from STIX:
+
+  * STIX\_Latin-Regular, STIX\_Latin-Bold, STIX\_Latin-Italic, 
+    STIX\_Latin-BoldItalic.
+
+      Glyphs from The Latin-1 Supplement (00080-000FF)
+      Latin Extended-A (00100-0017F) and Latin Extended-B (00180-0024F)
+      Latin Extended Additional (01E00-01EFF) blocks.
+
+  * STIX\_Language-Regular, STIX\_Language-Bold, STIX\_Language-Italic, 
+    STIX\_Language-BoldItalic.
+
+      Greek and Coptic (00370-003FF),
+      Cyrillic (00400-004FF), Hiragana (03040-0309F)
+
+* STIX-Other-Regular, STIX-Other-Bold, STIX-Other-Italic, 
+  STIX-Other-BoldItalic.
+
+  This will contain all the glyphs that have not been included in one of the
+  category above.
+
+TODO: Spacing Modifier Letters; 002B0-002FF
+ Combining Diacritical Marks; 00300-0036F
+ Phonetic Extensions; 01D00-01D7F
+ Phonetic Extensions Supplement; 01D80-01DBF
+ General Punctuation; 02000-0206F
+ Superscripts and Subscripts; 02070-0209F
+ Currency Symbols; 020A0-020CF
+ Combining Diacritical Marks for Symbols; 020D0-020FF
+ Letterlike Symbols; 02100-0214F
+ Number Forms; 02150-0218F
+ Arrows; 02190-021FF
+ Mathematical Operators; 02200-022FF
+ Miscellaneous Technical; 02300-023FF
+ Control Pictures; 02400-0243F
+ Enclosed Alphanumerics; 02460-024FF
+ Box Drawing; 02500-0257F
+ Block Elements; 02580-0259F
+ Geometric Shapes; 025A0-025FF
+ Miscellaneous Symbols; 02600-026FF
+ Dingbats; 02700-027BF
+ Miscellaneous Mathematical Symbols-A; 027C0-027EF
+ Supplemental Arrows-A; 027F0-027FF
+ Supplemental Arrows-B; 02900-0297F
+ Miscellaneous Mathematical Symbols-B; 02980-029FF
+ Supplemental Mathematical Operators; 02A00-02AFF
+ Miscellaneous Symbols and Arrows; 02B00-02BFF
+ CJK Symbols and Punctuation; 03000-0303F
+ Specials; 0FFF0-0FFFF
+ Mathematical Alphanumeric Symbols; 1D400-1D7FF